Merge branch 'staging' of https://github.com/stahta01/wxWidgets

Allow building wxGTK for MSW using MSys2 and configure.

Close https://github.com/wxWidgets/wxWidgets/pull/428

include/wx/gtk/mimetype.h

@@ -23,7 +23,9 @@
 class WXDLLIMPEXP_CORE wxGTKMimeTypesManagerImpl : public wxMimeTypesManagerImpl
 {
 protected:
+#if defined(__UNIX__)
     wxString GetIconFromMimeType(const wxString& mime) wxOVERRIDE;
+#endif
 };